Remove the securing nuts that hold the master cylinder to the power brake unit and position the master cylinder out of the way, taking care not to strain the hydraulic lines. If there is any doubt about the flexibility of the fluid lines, disconnect them at the cylinder and plug the ends. Disconnect the vacuum hose leading to the front of the power brake booster and cover the end of the hose. Loosen the four nuts that secure the booster to the firewall without removing them at this time. Inside the car, disconnect the power brake push rod from the 
Brake Pedal without forcing it to the side. Fully remove the four booster mounting nuts and carefully lift the unit out of the engine compartment. For installation, loosely install the four mounting nuts, connect the push rod to the brake pedal, torque-tighten the attaching nuts, and reconnect the vacuum hose and master cylinder. If the hydraulic brake fluid lines were disconnected, the master cylinder and the entire braking system should be bled to eliminate any air that has entered the system.